Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
  • C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/056—Forming hydrophilic coatings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/06—Coating with compositions not containing macromolecular substances
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
  • Y10T428/259—Silicic material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31507—Of polycarbonate
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Definitions

• the present invention relates to the surface treatment of polyester materials and more particularly to the treatment of the surface of such materials so that a subsequently applied coating will adhere firmly to said surface.
• a method of treating the surface of a polyester or polycarbonate material to facilitate adhesion to the surface of a subsequently applied coating which method consists in the application to it of a substantially uniform layer of adherent particles of finely divided silica, said layer being applied to the surface with a solvent dispersion of silica particles containing a wetting agent and one or more chloro-substituted organic acids from the group trichloroacetic, trichloropropionic and dichloroacetic acid. It is preferred that the particle size of the silica is not more than microns, the silica commercially available under the registered trademark Aerosil being particularly suitable.
• the surface to be treated may be the surface or surfaces of a sheet or film of polyester or polycarbonate material or may be the surfaces of yarns or threads formed of polyester or polycarbonate materials.
• the invention has particular application to the treatment of polymethylene terephthalates, such for example as polyethylene terephthalate, to facilitate the adhesion of a subsequently applied coating to the surface of said material.
• polymethylene terephthalates such for example as polyethylene terephthalate
• the material sold under the registered trademark Melinex when treated in accordance with the present invention may be readily coated by normal coating techniques with any desired coating layer.
• the Wetting agent may be present in a proportion of 0.05% to 0.2% by weight and may be one which retains its wetting properties in the presence of the acid and during drying of the dispersion on the surface of the material treated.
• the wetting agent may be a fluorocarbon compound such as that sold by Minnesota Mining and Manufacturing Company under the trade name F095 or a sulphonated oil such as that sold by Imperial Chemical Industries under the registered trademark Calsolene Oil HS.
• the solvent dispersion which may be an aqueous dispersion, may contain 0.1% to 20% and preferably 2% to 10% by weight of the chloro-substituted organic acid and 0.01% to 10% by weight of finely divided silica.
• the invention also provides a composition for treating the surface of polyester materials which consists of a solvent dispersion containing 0.01% to 10% by weight of silica having a particle size of not greater than 5 microns, 0.1% to 20% by Weight of a chloro-substituted organic acid from the group trichloroacetic, trichloropropionic and dichloroacetic acid and a proportion of a wetting agent.
• the proportion of chloro-substituted organic acids in the composition may be within the range 2% to 10% by Weight.
• the silica By treating the surface or surfaces of polyester materials in accordance with the present invention, when the dispersion of finely divided silica is caused orallowed to dry, the silica keys firmly to the surface of the material and provides the material with a surface to which subsequently applied coatings will firmly adhere.
• the quantity of the treating composition applied to the surface should be suflicient to result in a coating of silica particles sufficient to key the subsequently applied coating to the treated surface.
• EXAMPLE 1 A composition was prepared containing: Water litres 28 Trichloroacetic acid kilos 4.0 Dispersion of 8% of silica in water litres 10 Calsolene Oil HS in water do 1 The Calsolene Oil HS which was used as a wetting agent in this example was made up as a 10% solution in water prior to use.
• a fil-m of the polyester material commercially available under the registered trademark Melinex was coated with the above composition to give a coating weight of 10 to 20 grams per square yard of film.
• the coated film was dried in air at a temperature of 50 C.
• the resulting film was found to contain silica particles firmly bonded thereto.
• a coating of lacquer subsequently applied to the treated film surface was found to be firmly bonded thereto.
• a film of Melinex was coated with the same lacquer but not treated in accordance with the present invention, and in this case the coating, when dry, was found to easily flake or peel from the surface of the material.
• EXAMPLE 2 A composition was made up comprising: Water litres 28 2,2,3-trichloropropionic acid kilos 4.5 8% dispersion silica in water litres 10 10% solution of Calsolene Oil HS in water do 1 EXAMPLE 3 The process described in Example 1 was repeated except that instead of trichloroacetic acid, 4 litres of dichloroacetic acid were used.
• a film of polyester material available under the registered trademark Melinex was treated as described in Example 1.
• a coating of lacquer applied to the treated surface was found to be firmly bonded thereto and showed no tendency to flake or peel from the surface of the material.
• a method of treating the surface of a polyester or polycarbonate material to facilitate adhesion to said surface of a subsequently applied coating comprising applying to said surface a substantially uniform layer of adherent particles of silica of a particle size not greater than 5 microns by treating said surface with an aqueous dispersion of about 0.01 to 10% by weight of silica particles, from about 0.05% to 0.2% by weight of a sulphonated oil wetting agent, and from about 0.1 to 20% by weight of at least one chlorosubstituted organic acid selected from the group consisting of trichloroacetic, trichloropropionic, and dichloroacetic acid.
• polyester material is a polymethylene terephthalate.
• compositions for treating the surface of polyester and polycarbonate materials comprising an aqueous dispersion containing from about 0.01% to about 10% by weight of silica of a particle size not greater than 5 microns, from about 0.1% to 20% by weight of a chloro-substituted organic acid selected from the group consisting of trichloroacetic, trichloropropionic and dichloroacetic acids, and from about 0.05% to 0.2% by weight of a sulphonated oil wetting agent.
• composition as claimed in claim 8 wherein the proportion of chloro-substituted organic acid is within the range 2% to 10% byweight.

Landscapes

• Chemical & Material Sciences (AREA)
• Medicinal Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Wood Science & Technology (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Inorganic Chemistry (AREA)
• Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Laminated Bodies (AREA)
• Paints Or Removers (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10334594

Family Applications (1)

Country Status (5)

Cited By (14)

Families Citing this family (4)

Citations (4)

Family Cites Families (1)

• 0
  • NL NL296926D patent/NL296926A/xx unknown
• 1962
  • 1962-08-22 GB GB32184/62A patent/GB1061784A/en not_active Expired
• 1963
  • 1963-08-19 US US303181A patent/US3396046A/en not_active Expired - Lifetime
  • 1963-08-21 FI FI1605/63A patent/FI43117B/fi active
  • 1963-08-21 DE DEO9627A patent/DE1228414B/de active Pending

Patent Citations (4)

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